Don't Bet the Farm on Dollar's Skid

By

Craig Karmin

Updated March 23, 2008 12:01 a.m. ET

As the dollar tumbled to new lows this month against major currencies, Americans could do a lot more than sit on the sidelines and worry about how much more expensive it will be to visit Paris. Individual investors have more options today than ever to profit directly from the greenback's decline.

But having those tools isn't necessarily a blessing. As former Federal Reserve Chairman Alan Greenspan once dryly commented, the success of...